How much refrigerant is generally needed for an air conditioning recharge?

[LeKingston]

Turn on the air conditioning to cooling mode and add refrigerant from the low-pressure side until the pressure reaches 0.4~0.6. Below are some details about air conditioning refrigerant recharge: When the air conditioning is not in use, add refrigerant from the recharge port. The system pressure should reach 0.8~0.9 for optimal performance. The correct method for adding refrigerant is to do it slowly. After adding a small amount, let the air conditioning run for about 10 minutes, then measure the pressure and current. If necessary, add more in increments, rather than using the immediate pressure and current readings as the standard. When adding refrigerant in winter, you can disconnect the four-way valve coil or artificially raise the indoor temperature sensor to a level that allows cooling mode to activate.